Starter Warning

So, starter went completely out last weekend, had to quick get one in as wife's car was still in insurance hell. I bought locally at Advance Auto, decient price and all, but 1 major problem. The threads on the starter are wrong. They are course, and the stock starter is fine thread. After destroying the threads by not realizing it at first, it is now drilled out and bolted with a nut. Just FYI.